<template>
  <div class="cartcontrol">
    <transition name="move">
      <div class="cart-decrease" v-show="food.count>0" @click.stop.prevent="decreaseCart">
        <span class="inner icon-remove_circle_outline"></span>
      </div>
    </transition>
    <div class="cart-count" v-show="food.count>0">{{food.count}}</div>
    <div class="cart-add icon-add_circle" @click.stop.prevent="addCart"></div>
  </div>
</template>

<script type="text/ecmascript-6">
  import Vue from 'vue';

  export default {
    props: {
      food: {
        type: Object
      }
    },
    methods: {
      addCart(event) {
        if (!event._constructed) {
          return;
        }
        if (!this.food.count) {
          Vue.set(this.food, 'count', 1);
        } else {
          this.food.count++;
        }
        this.$emit('add', event.target);// 触发当前实例加一个事件，event.target作为对象参数传入
      },
      decreaseCart(event) {
        if (!event._constructed) {
          return;
        }
        if (this.food.count) {
          this.food.count--;
        }
      }
    }
  };
</script>

<style lang="scss" scoped="" type="text/css">
.cartcontrol {
  // font-size:0;
  .cart-decrease {
    display: inline-block;
    padding: 6px;
    opacity: 1;
    transform: translate3d(0, 0, 0);
    .inner {
      display: inline-block;
      line-height: 24px;
      font-size: 24px;
      color: rgb(0, 160, 220);
      transition: all 0.4s linear;
      transform: rotate(0);
    }
    &.move-enter-active,
    &.move-leave-active {
      transition: all 0.4s linear;
    }
    &.move-enter,
    &.move-leave-active {
      opacity: 0;
      transform: translate3d(24px, 0, 0);
      .inner {
        transform: rotate(180deg);
      }
    }
  }
  .cart-count {
    display: inline-block;
    vertical-align: top;
    width: 12px;
    padding-top: 6px;
    line-height: 24px;
    text-align: center;
    font-size: 10px;
    color: rgb(147, 153, 159);
  }
  .cart-add {
    display: inline-block;
    padding: 6px;
    line-height: 24px;
    font-size: 24px;
    color: rgb(0, 160, 220);
  }
}

</style>
